Targeting the problems in current route computation, such as lack of real time, large work volume on route maintenance, and lack of flexibility on route selection, etc. and starting with analysis on the route computation method, combining with service characteristics of stations on selling through tickets, the essay puts forward an improved and uniform route computation model. The model fully balances the characteristics of pre-computation and real-time computation, effectively separates the special route information on individual station and the common information of the whole railway network in route computation, and thoroughly solves the problems existing in the route computation.